Plate LXV. 



Fig. 302. CLADOPHORA GRACILIS. 



Colour. Briglit yellow-green. 



Substance. Soft; silky; but adliering imperfectly to paper; fading in tlie 

 herbarium^ but retaining its gloss. 



Character of Frond. Dense tufts of jointed threads [ filaments) , very much 

 branched. Filaments long, slender; the main ones entangled together 

 into something of a general stem_, from which spring very numerous, 

 long, wavy, angularly twisted branches, plentifully clothed with 

 branchlets; which are much divided and branched; almost tufted; 

 the last set long, slender, secund, in rows like the teeth of a comb. 



Joints. From three to five times longer than broad, filled with light-green 

 colouring matter [endochrome) . 



Measurement. From 6 to 12 inches long. 



Fructification. Minute seeds (zoospores) formed of the colouring matter in 

 the joints, and in due time bursting through them. 



Habitat. Our shores generally. On Zostera and the larger algae in from 

 four to six fathoms' water. Not uncommon. 



More luxuriant, more glossy, and more branching than C. flexuosa. Less 

 silky, less slender, and less soft than C. Budolphiana. 



Fig. 303. CLADOPHORA BALLIANA. 



Colour. Grass-green. 



Substance. Soft and tender; almost gelatinous, closely adhering to paper. 



Character of Frond. Fine tufts of jointed threads ( filaments) j very much 

 branched. Filaments extremely slender; set with long, upright, irreg- 

 ularly alternate branches. Branches excessively divided; the last 

 set upright^ rod-like; clothed with remarkably slender, secund, one- 

 or two-jointed branchlets. Tips pointed. 



Joints. Those of the branches eight or ten times longer than broad; of the 

 branchlets six or eight times; filled with remarkably dense green 

 colouring matter [endochrome). Partition-lines [dissepiments) broad 

 and transparent. 



Measurement. From 6 to 8 inches long. 



Fructification. Minute seeds [zoospores) formed of the colouring matter in 

 the joints, and in due time bursting through them. 



Habitat. Clontarf. Miss Ball. 



From the enormous length of the joints like no other British Cladopliora 

 but G, Rudolyliiania, from which a quite different character of branching separates 

 it. 



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